2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
37 void ieee80211_configure_filter(struct ieee80211_local *local)
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
43 if (atomic_read(&local->iff_promiscs))
44 new_flags |= FIF_PROMISC_IN_BSS;
46 if (atomic_read(&local->iff_allmultis))
47 new_flags |= FIF_ALLMULTI;
49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
82 WARN_ON(new_flags & (1<<31));
84 local->filter_flags = new_flags & ~(1<<31);
87 static void ieee80211_reconfig_filter(struct work_struct *work)
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
92 ieee80211_configure_filter(local);
95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97 struct ieee80211_sub_if_data *sdata;
98 struct ieee80211_channel *chan;
101 enum nl80211_channel_type channel_type;
103 bool scanning = false;
105 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
106 if (local->scan_channel) {
107 chan = local->scan_channel;
108 /* If scanning on oper channel, use whatever channel-type
109 * is currently in use.
111 if (chan == local->_oper_channel)
112 channel_type = local->_oper_channel_type;
114 channel_type = NL80211_CHAN_NO_HT;
115 } else if (local->tmp_channel) {
116 chan = local->tmp_channel;
117 channel_type = NL80211_CHAN_NO_HT;
119 chan = local->_oper_channel;
120 channel_type = local->_oper_channel_type;
123 if (chan != local->_oper_channel ||
124 channel_type != local->_oper_channel_type)
125 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
127 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
129 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
131 if (offchannel_flag || chan != local->hw.conf.channel ||
132 channel_type != local->hw.conf.channel_type) {
133 local->hw.conf.channel = chan;
134 local->hw.conf.channel_type = channel_type;
135 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
138 if (!conf_is_ht(&local->hw.conf)) {
140 * mac80211.h documents that this is only valid
141 * when the channel is set to an HT type, and
142 * that otherwise STATIC is used.
144 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
145 } else if (local->hw.conf.smps_mode != local->smps_mode) {
146 local->hw.conf.smps_mode = local->smps_mode;
147 changed |= IEEE80211_CONF_CHANGE_SMPS;
150 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
151 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
152 test_bit(SCAN_HW_SCANNING, &local->scanning);
153 power = chan->max_power;
156 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
157 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
159 power = min(power, sdata->vif.bss_conf.txpower);
163 if (local->hw.conf.power_level != power) {
164 changed |= IEEE80211_CONF_CHANGE_POWER;
165 local->hw.conf.power_level = power;
171 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
177 if (!local->use_chanctx)
178 changed |= ieee80211_hw_conf_chan(local);
180 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
181 IEEE80211_CONF_CHANGE_POWER);
183 if (changed && local->open_count) {
184 ret = drv_config(local, changed);
187 * HW reconfiguration should never fail, the driver has told
188 * us what it can support so it should live up to that promise.
191 * rfkill is not integrated with mac80211 and a
192 * configuration command can thus fail if hardware rfkill
195 * FIXME: integrate rfkill with mac80211 and then add this
205 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
208 struct ieee80211_local *local = sdata->local;
213 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
216 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
218 sdata->vif.bss_conf.use_cts_prot = false;
219 sdata->vif.bss_conf.use_short_preamble = false;
220 sdata->vif.bss_conf.use_short_slot = false;
221 return BSS_CHANGED_ERP_CTS_PROT |
222 BSS_CHANGED_ERP_PREAMBLE |
223 BSS_CHANGED_ERP_SLOT;
226 static void ieee80211_tasklet_handler(unsigned long data)
228 struct ieee80211_local *local = (struct ieee80211_local *) data;
231 while ((skb = skb_dequeue(&local->skb_queue)) ||
232 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
233 switch (skb->pkt_type) {
234 case IEEE80211_RX_MSG:
235 /* Clear skb->pkt_type in order to not confuse kernel
238 ieee80211_rx(&local->hw, skb);
240 case IEEE80211_TX_STATUS_MSG:
242 ieee80211_tx_status(&local->hw, skb);
245 WARN(1, "mac80211: Packet is of unknown type %d\n",
253 static void ieee80211_restart_work(struct work_struct *work)
255 struct ieee80211_local *local =
256 container_of(work, struct ieee80211_local, restart_work);
258 /* wait for scan work complete */
259 flush_workqueue(local->workqueue);
261 mutex_lock(&local->mtx);
262 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
263 rcu_dereference_protected(local->sched_scan_sdata,
264 lockdep_is_held(&local->mtx)),
265 "%s called with hardware scan in progress\n", __func__);
266 mutex_unlock(&local->mtx);
269 ieee80211_scan_cancel(local);
270 ieee80211_reconfig(local);
274 void ieee80211_restart_hw(struct ieee80211_hw *hw)
276 struct ieee80211_local *local = hw_to_local(hw);
278 trace_api_restart_hw(local);
280 wiphy_info(hw->wiphy,
281 "Hardware restart was requested\n");
283 /* use this reason, ieee80211_reconfig will unblock it */
284 ieee80211_stop_queues_by_reason(hw,
285 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
288 * Stop all Rx during the reconfig. We don't want state changes
289 * or driver callbacks while this is in progress.
291 local->in_reconfig = true;
294 schedule_work(&local->restart_work);
296 EXPORT_SYMBOL(ieee80211_restart_hw);
299 static int ieee80211_ifa_changed(struct notifier_block *nb,
300 unsigned long data, void *arg)
302 struct in_ifaddr *ifa = arg;
303 struct ieee80211_local *local =
304 container_of(nb, struct ieee80211_local,
306 struct net_device *ndev = ifa->ifa_dev->dev;
307 struct wireless_dev *wdev = ndev->ieee80211_ptr;
308 struct in_device *idev;
309 struct ieee80211_sub_if_data *sdata;
310 struct ieee80211_bss_conf *bss_conf;
311 struct ieee80211_if_managed *ifmgd;
314 /* Make sure it's our interface that got changed */
318 if (wdev->wiphy != local->hw.wiphy)
321 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
322 bss_conf = &sdata->vif.bss_conf;
324 /* ARP filtering is only supported in managed mode */
325 if (sdata->vif.type != NL80211_IFTYPE_STATION)
328 idev = __in_dev_get_rtnl(sdata->dev);
332 ifmgd = &sdata->u.mgd;
333 mutex_lock(&ifmgd->mtx);
335 /* Copy the addresses to the bss_conf list */
336 ifa = idev->ifa_list;
338 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
339 bss_conf->arp_addr_list[c] = ifa->ifa_address;
344 bss_conf->arp_addr_cnt = c;
346 /* Configure driver only if associated (which also implies it is up) */
347 if (ifmgd->associated)
348 ieee80211_bss_info_change_notify(sdata,
349 BSS_CHANGED_ARP_FILTER);
351 mutex_unlock(&ifmgd->mtx);
357 #if IS_ENABLED(CONFIG_IPV6)
358 static int ieee80211_ifa6_changed(struct notifier_block *nb,
359 unsigned long data, void *arg)
361 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
362 struct inet6_dev *idev = ifa->idev;
363 struct net_device *ndev = ifa->idev->dev;
364 struct ieee80211_local *local =
365 container_of(nb, struct ieee80211_local, ifa6_notifier);
366 struct wireless_dev *wdev = ndev->ieee80211_ptr;
367 struct ieee80211_sub_if_data *sdata;
369 /* Make sure it's our interface that got changed */
370 if (!wdev || wdev->wiphy != local->hw.wiphy)
373 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
376 * For now only support station mode. This is mostly because
377 * doing AP would have to handle AP_VLAN in some way ...
379 if (sdata->vif.type != NL80211_IFTYPE_STATION)
382 drv_ipv6_addr_change(local, sdata, idev);
388 /* There isn't a lot of sense in it, but you can transmit anything you like */
389 static const struct ieee80211_txrx_stypes
390 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
391 [NL80211_IFTYPE_ADHOC] = {
393 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
394 BIT(IEEE80211_STYPE_AUTH >> 4) |
395 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
396 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
398 [NL80211_IFTYPE_STATION] = {
400 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
401 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
403 [NL80211_IFTYPE_AP] = {
405 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
406 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
407 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
408 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
409 BIT(IEEE80211_STYPE_AUTH >> 4) |
410 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
411 BIT(IEEE80211_STYPE_ACTION >> 4),
413 [NL80211_IFTYPE_AP_VLAN] = {
416 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
417 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
418 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
419 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
420 BIT(IEEE80211_STYPE_AUTH >> 4) |
421 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
422 BIT(IEEE80211_STYPE_ACTION >> 4),
424 [NL80211_IFTYPE_P2P_CLIENT] = {
426 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
427 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
429 [NL80211_IFTYPE_P2P_GO] = {
431 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
432 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
433 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
434 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
435 BIT(IEEE80211_STYPE_AUTH >> 4) |
436 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
437 BIT(IEEE80211_STYPE_ACTION >> 4),
439 [NL80211_IFTYPE_MESH_POINT] = {
441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
442 BIT(IEEE80211_STYPE_AUTH >> 4) |
443 BIT(IEEE80211_STYPE_DEAUTH >> 4),
445 [NL80211_IFTYPE_P2P_DEVICE] = {
447 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
452 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
453 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
454 IEEE80211_HT_AMPDU_PARM_DENSITY,
456 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
457 IEEE80211_HT_CAP_MAX_AMSDU |
458 IEEE80211_HT_CAP_SGI_20 |
459 IEEE80211_HT_CAP_SGI_40),
461 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
462 0xff, 0xff, 0xff, 0xff, 0xff, },
466 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
468 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
469 IEEE80211_VHT_CAP_SHORT_GI_80 |
470 IEEE80211_VHT_CAP_SHORT_GI_160 |
471 IEEE80211_VHT_CAP_RXSTBC_1 |
472 IEEE80211_VHT_CAP_RXSTBC_2 |
473 IEEE80211_VHT_CAP_RXSTBC_3 |
474 IEEE80211_VHT_CAP_RXSTBC_4 |
475 IEEE80211_VHT_CAP_TXSTBC |
476 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
477 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
478 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
479 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
480 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
482 .rx_mcs_map = cpu_to_le16(~0),
483 .tx_mcs_map = cpu_to_le16(~0),
487 static const u8 extended_capabilities[] = {
489 WLAN_EXT_CAPA8_OPMODE_NOTIF,
492 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
493 const struct ieee80211_ops *ops)
495 struct ieee80211_local *local;
500 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
501 !ops->add_interface || !ops->remove_interface ||
502 !ops->configure_filter))
505 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
508 /* check all or no channel context operations exist */
509 i = !!ops->add_chanctx + !!ops->remove_chanctx +
510 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
511 !!ops->unassign_vif_chanctx;
512 if (WARN_ON(i != 0 && i != 5))
514 use_chanctx = i == 5;
516 /* Ensure 32-byte alignment of our private data and hw private data.
517 * We use the wiphy priv data for both our ieee80211_local and for
518 * the driver's private data
520 * In memory it'll be like this:
522 * +-------------------------+
524 * +-------------------------+
525 * | struct ieee80211_local |
526 * +-------------------------+
527 * | driver's private data |
528 * +-------------------------+
531 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
533 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
538 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
540 wiphy->privid = mac80211_wiphy_privid;
542 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
543 WIPHY_FLAG_4ADDR_AP |
544 WIPHY_FLAG_4ADDR_STATION |
545 WIPHY_FLAG_REPORTS_OBSS |
546 WIPHY_FLAG_OFFCHAN_TX;
548 wiphy->extended_capabilities = extended_capabilities;
549 wiphy->extended_capabilities_mask = extended_capabilities;
550 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
552 if (ops->remain_on_channel)
553 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
555 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
556 NL80211_FEATURE_SAE |
557 NL80211_FEATURE_HT_IBSS |
558 NL80211_FEATURE_VIF_TXPOWER |
559 NL80211_FEATURE_USERSPACE_MPM;
562 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
563 NL80211_FEATURE_AP_SCAN;
567 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
569 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
571 local = wiphy_priv(wiphy);
573 local->hw.wiphy = wiphy;
575 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
578 local->use_chanctx = use_chanctx;
580 /* set up some defaults */
581 local->hw.queues = 1;
582 local->hw.max_rates = 1;
583 local->hw.max_report_rates = 0;
584 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
585 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
586 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
587 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
588 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
589 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
590 IEEE80211_RADIOTAP_MCS_HAVE_GI |
591 IEEE80211_RADIOTAP_MCS_HAVE_BW;
592 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
593 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
594 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
595 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
596 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
598 INIT_LIST_HEAD(&local->interfaces);
600 __hw_addr_init(&local->mc_list);
602 mutex_init(&local->iflist_mtx);
603 mutex_init(&local->mtx);
605 mutex_init(&local->key_mtx);
606 spin_lock_init(&local->filter_lock);
607 spin_lock_init(&local->rx_path_lock);
608 spin_lock_init(&local->queue_stop_reason_lock);
610 INIT_LIST_HEAD(&local->chanctx_list);
611 mutex_init(&local->chanctx_mtx);
613 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
615 INIT_WORK(&local->restart_work, ieee80211_restart_work);
617 INIT_WORK(&local->radar_detected_work,
618 ieee80211_dfs_radar_detected_work);
620 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
621 local->smps_mode = IEEE80211_SMPS_OFF;
623 INIT_WORK(&local->dynamic_ps_enable_work,
624 ieee80211_dynamic_ps_enable_work);
625 INIT_WORK(&local->dynamic_ps_disable_work,
626 ieee80211_dynamic_ps_disable_work);
627 setup_timer(&local->dynamic_ps_timer,
628 ieee80211_dynamic_ps_timer, (unsigned long) local);
630 INIT_WORK(&local->sched_scan_stopped_work,
631 ieee80211_sched_scan_stopped_work);
633 spin_lock_init(&local->ack_status_lock);
634 idr_init(&local->ack_status_frames);
636 sta_info_init(local);
638 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
639 skb_queue_head_init(&local->pending[i]);
640 atomic_set(&local->agg_queue_stop[i], 0);
642 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
643 (unsigned long)local);
645 tasklet_init(&local->tasklet,
646 ieee80211_tasklet_handler,
647 (unsigned long) local);
649 skb_queue_head_init(&local->skb_queue);
650 skb_queue_head_init(&local->skb_queue_unreliable);
652 ieee80211_led_names(local);
654 ieee80211_roc_setup(local);
658 EXPORT_SYMBOL(ieee80211_alloc_hw);
660 int ieee80211_register_hw(struct ieee80211_hw *hw)
662 struct ieee80211_local *local = hw_to_local(hw);
664 enum ieee80211_band band;
665 int channels, max_bitrates;
666 bool supp_ht, supp_vht;
667 netdev_features_t feature_whitelist;
668 static const u32 cipher_suites[] = {
669 /* keep WEP first, it may be removed below */
670 WLAN_CIPHER_SUITE_WEP40,
671 WLAN_CIPHER_SUITE_WEP104,
672 WLAN_CIPHER_SUITE_TKIP,
673 WLAN_CIPHER_SUITE_CCMP,
675 /* keep last -- depends on hw flags! */
676 WLAN_CIPHER_SUITE_AES_CMAC
679 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
680 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
681 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
685 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
686 (!local->ops->suspend || !local->ops->resume))
690 if (!local->use_chanctx) {
691 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
692 const struct ieee80211_iface_combination *comb;
694 comb = &local->hw.wiphy->iface_combinations[i];
696 if (comb->num_different_channels > 1)
701 * WDS is currently prohibited when channel contexts are used
702 * because there's no clear definition of which channel WDS
703 * type interfaces use
705 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
708 /* DFS currently not supported with channel context drivers */
709 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
710 const struct ieee80211_iface_combination *comb;
712 comb = &local->hw.wiphy->iface_combinations[i];
714 if (comb->radar_detect_widths)
719 /* Only HW csum features are currently compatible with mac80211 */
720 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
722 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
725 if (hw->max_report_rates == 0)
726 hw->max_report_rates = hw->max_rates;
728 local->rx_chains = 1;
731 * generic code guarantees at least one band,
732 * set this very early because much code assumes
733 * that hw.conf.channel is assigned
739 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
740 struct ieee80211_supported_band *sband;
742 sband = local->hw.wiphy->bands[band];
745 if (!local->use_chanctx && !local->_oper_channel) {
746 /* init channel we're on */
747 local->hw.conf.channel =
748 local->_oper_channel = &sband->channels[0];
749 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
751 cfg80211_chandef_create(&local->monitor_chandef,
754 channels += sband->n_channels;
756 if (max_bitrates < sband->n_bitrates)
757 max_bitrates = sband->n_bitrates;
758 supp_ht = supp_ht || sband->ht_cap.ht_supported;
759 supp_vht = supp_vht || sband->vht_cap.vht_supported;
761 if (sband->ht_cap.ht_supported)
763 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
766 /* TODO: consider VHT for RX chains, hopefully it's the same */
769 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
770 sizeof(void *) * channels, GFP_KERNEL);
771 if (!local->int_scan_req)
774 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
775 if (!local->hw.wiphy->bands[band])
777 local->int_scan_req->rates[band] = (u32) -1;
780 /* if low-level driver supports AP, we also support VLAN */
781 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
782 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
783 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
786 /* mac80211 always supports monitor */
787 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
788 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
790 /* mac80211 doesn't support more than one IBSS interface right now */
791 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
792 const struct ieee80211_iface_combination *c;
795 c = &hw->wiphy->iface_combinations[i];
797 for (j = 0; j < c->n_limits; j++)
798 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
799 c->limits[j].max > 1)
803 #ifndef CONFIG_MAC80211_MESH
804 /* mesh depends on Kconfig, but drivers should set it if they want */
805 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
808 /* if the underlying driver supports mesh, mac80211 will (at least)
809 * provide routing of mesh authentication frames to userspace */
810 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
811 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
813 /* mac80211 supports control port protocol changing */
814 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
816 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
817 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
818 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
819 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
821 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
822 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
823 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
826 * Calculate scan IE length -- we need this to alloc
827 * memory and to subtract from the driver limit. It
828 * includes the DS Params, (extended) supported rates, and HT
829 * information -- SSID is the driver's responsibility.
831 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
834 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
837 local->scan_ies_len +=
838 2 + sizeof(struct ieee80211_vht_cap);
841 * (for now at least), drivers wanting to use VHT must
842 * support channel contexts, as they contain all the
843 * necessary VHT information and the global hw config
846 if (WARN_ON(!local->use_chanctx)) {
848 goto fail_wiphy_register;
852 if (!local->ops->hw_scan) {
853 /* For hw_scan, driver needs to set these up. */
854 local->hw.wiphy->max_scan_ssids = 4;
855 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
859 * If the driver supports any scan IEs, then assume the
860 * limit includes the IEs mac80211 will add, otherwise
861 * leave it at zero and let the driver sort it out; we
862 * still pass our IEs to the driver but userspace will
863 * not be allowed to in that case.
865 if (local->hw.wiphy->max_scan_ie_len)
866 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
868 /* Set up cipher suites unless driver already did */
869 if (!local->hw.wiphy->cipher_suites) {
870 local->hw.wiphy->cipher_suites = cipher_suites;
871 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
872 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
873 local->hw.wiphy->n_cipher_suites--;
875 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
876 if (local->hw.wiphy->cipher_suites == cipher_suites) {
877 local->hw.wiphy->cipher_suites += 2;
878 local->hw.wiphy->n_cipher_suites -= 2;
886 local->hw.wiphy->cipher_suites,
887 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
891 goto fail_wiphy_register;
893 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
894 u32 suite = local->hw.wiphy->cipher_suites[r];
895 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
896 suite == WLAN_CIPHER_SUITE_WEP104)
900 local->hw.wiphy->cipher_suites = suites;
901 local->hw.wiphy->n_cipher_suites = w;
902 local->wiphy_ciphers_allocated = true;
906 if (!local->ops->remain_on_channel)
907 local->hw.wiphy->max_remain_on_channel_duration = 5000;
909 if (local->ops->sched_scan_start)
910 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
912 /* mac80211 based drivers don't support internal TDLS setup */
913 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
914 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
916 result = wiphy_register(local->hw.wiphy);
918 goto fail_wiphy_register;
921 * We use the number of queues for feature tests (QoS, HT) internally
922 * so restrict them appropriately.
924 if (hw->queues > IEEE80211_MAX_QUEUES)
925 hw->queues = IEEE80211_MAX_QUEUES;
928 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
929 if (!local->workqueue) {
935 * The hardware needs headroom for sending the frame,
936 * and we need some headroom for passing the frame to monitor
937 * interfaces, but never both at the same time.
939 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
940 IEEE80211_TX_STATUS_HEADROOM);
942 debugfs_hw_add(local);
945 * if the driver doesn't specify a max listen interval we
946 * use 5 which should be a safe default
948 if (local->hw.max_listen_interval == 0)
949 local->hw.max_listen_interval = 5;
951 local->hw.conf.listen_interval = local->hw.max_listen_interval;
953 local->dynamic_ps_forced_timeout = -1;
955 result = ieee80211_wep_init(local);
957 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
960 ieee80211_led_init(local);
964 result = ieee80211_init_rate_ctrl_alg(local,
965 hw->rate_control_algorithm);
967 wiphy_debug(local->hw.wiphy,
968 "Failed to initialize rate control algorithm\n");
972 /* add one default STA interface if supported */
973 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
974 result = ieee80211_if_add(local, "wlan%d", NULL,
975 NL80211_IFTYPE_STATION, NULL);
977 wiphy_warn(local->hw.wiphy,
978 "Failed to add default virtual iface\n");
983 local->network_latency_notifier.notifier_call =
984 ieee80211_max_network_latency;
985 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
986 &local->network_latency_notifier);
993 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
994 result = register_inetaddr_notifier(&local->ifa_notifier);
999 #if IS_ENABLED(CONFIG_IPV6)
1000 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1001 result = register_inet6addr_notifier(&local->ifa6_notifier);
1008 #if IS_ENABLED(CONFIG_IPV6)
1011 unregister_inetaddr_notifier(&local->ifa_notifier);
1014 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1016 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1017 &local->network_latency_notifier);
1021 ieee80211_led_exit(local);
1022 ieee80211_remove_interfaces(local);
1025 ieee80211_wep_free(local);
1026 sta_info_stop(local);
1027 destroy_workqueue(local->workqueue);
1029 wiphy_unregister(local->hw.wiphy);
1030 fail_wiphy_register:
1031 if (local->wiphy_ciphers_allocated)
1032 kfree(local->hw.wiphy->cipher_suites);
1033 kfree(local->int_scan_req);
1036 EXPORT_SYMBOL(ieee80211_register_hw);
1038 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1040 struct ieee80211_local *local = hw_to_local(hw);
1042 tasklet_kill(&local->tx_pending_tasklet);
1043 tasklet_kill(&local->tasklet);
1045 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1046 &local->network_latency_notifier);
1048 unregister_inetaddr_notifier(&local->ifa_notifier);
1050 #if IS_ENABLED(CONFIG_IPV6)
1051 unregister_inet6addr_notifier(&local->ifa6_notifier);
1057 * At this point, interface list manipulations are fine
1058 * because the driver cannot be handing us frames any
1059 * more and the tasklet is killed.
1061 ieee80211_remove_interfaces(local);
1065 cancel_work_sync(&local->restart_work);
1066 cancel_work_sync(&local->reconfig_filter);
1068 ieee80211_clear_tx_pending(local);
1069 rate_control_deinitialize(local);
1071 if (skb_queue_len(&local->skb_queue) ||
1072 skb_queue_len(&local->skb_queue_unreliable))
1073 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1074 skb_queue_purge(&local->skb_queue);
1075 skb_queue_purge(&local->skb_queue_unreliable);
1077 destroy_workqueue(local->workqueue);
1078 wiphy_unregister(local->hw.wiphy);
1079 sta_info_stop(local);
1080 ieee80211_wep_free(local);
1081 ieee80211_led_exit(local);
1082 kfree(local->int_scan_req);
1084 EXPORT_SYMBOL(ieee80211_unregister_hw);
1086 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1088 WARN_ONCE(1, "Have pending ack frames!\n");
1093 void ieee80211_free_hw(struct ieee80211_hw *hw)
1095 struct ieee80211_local *local = hw_to_local(hw);
1097 mutex_destroy(&local->iflist_mtx);
1098 mutex_destroy(&local->mtx);
1100 if (local->wiphy_ciphers_allocated)
1101 kfree(local->hw.wiphy->cipher_suites);
1103 idr_for_each(&local->ack_status_frames,
1104 ieee80211_free_ack_frame, NULL);
1105 idr_destroy(&local->ack_status_frames);
1107 wiphy_free(local->hw.wiphy);
1109 EXPORT_SYMBOL(ieee80211_free_hw);
1111 static int __init ieee80211_init(void)
1113 struct sk_buff *skb;
1116 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1117 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1118 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1120 ret = rc80211_minstrel_init();
1124 ret = rc80211_minstrel_ht_init();
1128 ret = rc80211_pid_init();
1132 ret = ieee80211_iface_init();
1140 rc80211_minstrel_ht_exit();
1142 rc80211_minstrel_exit();
1147 static void __exit ieee80211_exit(void)
1150 rc80211_minstrel_ht_exit();
1151 rc80211_minstrel_exit();
1155 ieee80211_iface_exit();
1161 subsys_initcall(ieee80211_init);
1162 module_exit(ieee80211_exit);
1164 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1165 MODULE_LICENSE("GPL");